/*
 * =====================================================================================
 *
 *       Filename:  pubsub.h
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2021年03月24日 18时44分36秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Li Chao (), 
 *   Organization:  
 *
 * =====================================================================================
 */
#ifndef PUBSUB_4KGRA997
#define PUBSUB_4KGRA997

#include "shm_queue.h"
#include <thread>
#include <atomic>
#include <mutex>
#include <vector>
#include <unordered_map>
#include <set>

namespace bhome_shm {

// publish/subcribe manager.
class BusManager
{
    SharedMemory &shm_;
    ShmMsgQueue busq_;
    std::atomic<bool> run_;
    std::vector<std::thread> workers_;
    std::mutex mutex_;
    typedef std::set<MQId> Clients;
    std::unordered_map<std::string, Clients> records_;

    bool StopNoLock();
    void OnMsg(const BHMsg &msg);
public:
    BusManager(SharedMemory &shm);
    ~BusManager();
    bool Start(const int nworker = 2);
    bool Stop();
};


} // namespace bhome_shm

#endif // end of include guard: PUBSUB_4KGRA997